/**
 * Created by chenxiaoyu on 2018/7/22.
 * Email 1524904743@qq.com
 */

require(['../../js/config.js'], function () {
    require(['jquery', 'pub'], function ($, _pub) {

        $(function(){
            if (!!sessionStorage.getItem('username')){
                window.location.href= '../../index.html';
            }
            var canvas = document.querySelector('canvas'),
                ctx = canvas.getContext('2d')
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
            ctx.lineWidth = .3;
            ctx.strokeStyle = (new Color(150)).style;

            var mousePosition = {
                x: 30 * canvas.width / 100,
                y: 30 * canvas.height / 100
            };

            var dots = {
                nb: 750,
                distance: 50,
                d_radius: 100,
                array: []
            };

            function colorValue(min) {
                return Math.floor(Math.random() * 255 + min);
            }

            function createColorStyle(r,g,b) {
                return 'rgba(' + r + ',' + g + ',' + b + ', 0.8)';
            }

            function mixComponents(comp1, weight1, comp2, weight2) {
                return (comp1 * weight1 + comp2 * weight2) / (weight1 + weight2);
            }

            function averageColorStyles(dot1, dot2) {
                var color1 = dot1.color,
                    color2 = dot2.color;

                var r = mixComponents(color1.r, dot1.radius, color2.r, dot2.radius),
                    g = mixComponents(color1.g, dot1.radius, color2.g, dot2.radius),
                    b = mixComponents(color1.b, dot1.radius, color2.b, dot2.radius);
                return createColorStyle(Math.floor(r), Math.floor(g), Math.floor(b));
            }

            function Color(min) {
                min = min || 0;
                this.r = colorValue(min);
                this.g = colorValue(min);
                this.b = colorValue(min);
                this.style = createColorStyle(this.r, this.g, this.b);
            }

            function Dot(){
                this.x = Math.random() * canvas.width;
                this.y = Math.random() * canvas.height;

                this.vx = -.5 + Math.random();
                this.vy = -.5 + Math.random();

                this.radius = Math.random() * 2;

                this.color = new Color();
            }

            Dot.prototype = {
                draw: function(){
                    ctx.beginPath();
                    ctx.fillStyle = this.color.style;
                    ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);
                    ctx.fill();
                }
            };

            function createDots(){
                for(i = 0; i < dots.nb; i++){
                    dots.array.push(new Dot());
                }
            }

            function moveDots() {
                for(i = 0; i < dots.nb; i++){

                    var dot = dots.array[i];

                    if(dot.y < 0 || dot.y > canvas.height){
                        dot.vx = dot.vx;
                        dot.vy = - dot.vy;
                    }
                    else if(dot.x < 0 || dot.x > canvas.width){
                        dot.vx = - dot.vx;
                        dot.vy = dot.vy;
                    }
                    dot.x += dot.vx;
                    dot.y += dot.vy;
                }
            }

            function connectDots() {
                for(i = 0; i < dots.nb; i++){
                    for(j = 0; j < dots.nb; j++){
                        i_dot = dots.array[i];
                        j_dot = dots.array[j];

                        if((i_dot.x - j_dot.x) < dots.distance && (i_dot.y - j_dot.y) < dots.distance && (i_dot.x - j_dot.x) > - dots.distance && (i_dot.y - j_dot.y) > - dots.distance){
                            if((i_dot.x - mousePosition.x) < dots.d_radius && (i_dot.y - mousePosition.y) < dots.d_radius && (i_dot.x - mousePosition.x) > - dots.d_radius && (i_dot.y - mousePosition.y) > - dots.d_radius){
                                ctx.beginPath();
                                ctx.strokeStyle = averageColorStyles(i_dot, j_dot);
                                ctx.moveTo(i_dot.x, i_dot.y);
                                ctx.lineTo(j_dot.x, j_dot.y);
                                ctx.stroke();
                                ctx.closePath();
                            }
                        }
                    }
                }
            }

            function drawDots() {
                for(i = 0; i < dots.nb; i++){
                    var dot = dots.array[i];
                    dot.draw();
                }
            }

            function animateDots() {
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                moveDots();
                connectDots();
                drawDots();

                requestAnimationFrame(animateDots);
            }

            $('canvas').on('mousemove', function(e){
                mousePosition.x = e.pageX;
                mousePosition.y = e.pageY;
            });

            $('canvas').on('mouseleave', function(e){
                mousePosition.x = canvas.width / 2;
                mousePosition.y = canvas.height / 2;
            });

            createDots();
            requestAnimationFrame(animateDots);
        });

        $(document).on('click', function (e) {
            var event= e || window.event;
            var tag= event.target || event.srcElement;
            if($(tag).hasClass('login-btn')){
                var username= $('i.fi-locked + input').val().trim();
                var password= $('i.fi-key + input').val().trim();
                if (username === 'chenxiaoyu' && password === '123456'){
                    sessionStorage.setItem('username', username);
                    sessionStorage.setItem('password', password);
                    window.location.href= '../../index.html';
                }
            }else if($(tag).hasClass('register-btn')){
                alert('网站暂未开放注册');
            }
        })
    })
})